I want to use bisect for the first commit that introduced some line. Using git log -S wasn’t successful, so I suspect the issue be introduced in a merge commit.

I could do git bisect run ag my-search-phrase if I were looking for the first commit to remove that line. I tried to use ! ag, but git does not find executable !. I could do bash -c "..." but this is clumsy and harder to read.

Is there a more elegant way to negate the exit code so git bisect run can make use of that?